NST-EXPERT is a medical expert system designed to evaluate fetal condi
tion (especially in 'high risk' pregnancies). The system reasons based
on data from the Non-Stress Test (NST), a monitoring test widely used
in obstetrics. From specific limited maternal-fetal context informati
on together with the analysis of the NST results the system infers a d
iagnosis for each case, elaborates a therapeutic plan, and suggests a
prognosis of an early neonatal outcome. This article describes a new v
ersion based on a previous research prototype. Such systems can aid cl
inicians of varied experience in assessing and managing complicated pr
egnancies.